＞環境

    "react-native-camera": "^0.13.0",
    "react-native-fbsdk": "^0.7.0",

＞エラー内容

The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.
sdkInitialized
    Validate.java:143
<init>
    AppEventsLogger.java:950
<init>
    AppEventsLogger.java:940
newLogger
    AppEventsLogger.java:452
initialize
    FBAppEventsLoggerModule.java:117
doInitialize
    ModuleHolder.java:198
markInitializable
    ModuleHolder.java:86
notifyJSInstanceInitialized
    NativeModuleRegistry.java:125
run
    CatalystInstanceImpl.java:385
handleCallback
    Handler.java:751
dispatchMessage
    Handler.java:95
dispatchMessage
    MessageQueueThreadHandler.java:31
loop
    Looper.java:154
run
    MessageQueueThreadImpl.java:194
run
    Thread.java:761

＞修正内容

下記を追加
FacebookSdk.sdkInitialize(getApplicationContext());

    public void onCreate() {
        super.onCreate();
        SoLoader.init(this, /* native exopackage */ false);
        FacebookSdk.sdkInitialize(getApplicationContext());  // <- 追加
    }

＞参考URL